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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Dynamic.Utils;
namespace System.Linq.Expressions.Interpreter
{
internal abstract class LeftShiftInstruction : Instruction
{
private static Instruction? s_SByte, s_Int16, s_Int32, s_Int64, s_Byte, s_UInt16, s_UInt32, s_UInt64;
public override int ConsumedStack => 2;
public override int ProducedStack => 1;
public override string InstructionName => "LeftShift";
private LeftShiftInstruction() { }
private sealed class LeftShiftSByte : LeftShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push(unchecked((sbyte)((sbyte)value << (int)shift)));
}
return 1;
}
}
private sealed class LeftShiftInt16 : LeftShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push(unchecked((short)((short)value << (int)shift)));
}
return 1;
}
}
private sealed class LeftShiftInt32 : LeftShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push((int)value << (int)shift);
}
return 1;
}
}
private sealed class LeftShiftInt64 : LeftShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push((long)value << (int)shift);
}
return 1;
}
}
private sealed class LeftShiftByte : LeftShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push(unchecked((byte)((byte)value << (int)shift)));
}
return 1;
}
}
private sealed class LeftShiftUInt16 : LeftShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push(unchecked((ushort)((ushort)value << (int)shift)));
}
return 1;
}
}
private sealed class LeftShiftUInt32 : LeftShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push((uint)value << (int)shift);
}
return 1;
}
}
private sealed class LeftShiftUInt64 : LeftShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push((ulong)value << (int)shift);
}
return 1;
}
}
public static Instruction Create(Type type) =>
type.GetNonNullableType().GetTypeCode() switch
{
TypeCode.SByte => s_SByte ??= new LeftShiftSByte(),
TypeCode.Int16 => s_Int16 ??= new LeftShiftInt16(),
TypeCode.Int32 => s_Int32 ??= new LeftShiftInt32(),
TypeCode.Int64 => s_Int64 ??= new LeftShiftInt64(),
TypeCode.Byte => s_Byte ??= new LeftShiftByte(),
TypeCode.UInt16 => s_UInt16 ??= new LeftShiftUInt16(),
TypeCode.UInt32 => s_UInt32 ??= new LeftShiftUInt32(),
TypeCode.UInt64 => s_UInt64 ??= new LeftShiftUInt64(),
_ => throw ContractUtils.Unreachable,
};
}
}
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